void AddPackage(string name, string version, string[] descriptorLines)
{
var packageFile = Packager.NewWithDescriptor(file_system.CreateTempFile(), name, version, descriptorLines);
using (var publisher = (IPackagePublisherWithSource)repository.Publisher())
using (var packageFileStream = packageFile.OpenRead())
{
publisher.Publish(source_repository, name + "-" + version + ".wrap", packageFileStream);
}
}